scholarly journals Albendazole Degradation Possibilities by UV-Based Advanced Oxidation Processes

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Davor Ljubas ◽  
Mirta Čizmić ◽  
Katarina Vrbat ◽  
Draženka Stipaničev ◽  
Siniša Repec ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Advanced Oxidation Processes ◽  
New Technologies ◽  
Wastewater Treatment Plants ◽  
Degradation Products ◽  
Advanced Oxidation ◽  
Degradation Process ◽  
Nontarget Organisms ◽  
Uv Photolysis ◽  
Oxidation Processes

Pharmaceuticals are present in an aquatic environment usually in low (ng/L) concentrations. Their continuous release can lead to unwanted effects on the nontarget organisms. The main points of their collection and release into the environment are wastewater treatment plants. The wastewater treatment plants should be upgraded by new technologies, like advanced oxidation processes (AOPs), to be able to degrade these new pollutants. In this study, the degradation of albendazole (ALB), a drug against parasitic helminths, was investigated using four UV-based AOPs: UV photolysis, UV photocatalysis (over TiO2 film), UV + O3, and UV + H2O2. The ranking of the degradation process degree of the ALB and its degradation products for studied processes is as follows: UV photolysis < UV photocatalysis with TiO2 < UV + O3 < UV + H2O2. The fastest degradation of ALB and its degradation products was obtained by UV-C + H2O2 process with a degradation efficiency of 99.95%, achieved in 15 minutes.

scholarly journals Kinetics and Mechanistic Studies of Photochemical and Oxidative Stability of Galaxolide

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1813
Author(s):  
Aneta Sokol ◽  
Artur Ratkiewicz ◽  
Iwona Tomaszewska ◽  
Joanna Karpinska
Keyword(s):  
Advanced Oxidation Processes ◽  
Degradation Products ◽  
Advanced Oxidation ◽  
Degradation Process ◽  
Oh Radicals ◽  
Direct Photolysis ◽  
Oxidation Processes ◽  
First Order Kinetics ◽  
Kinetics Of ◽  
Oxidative Agents

Studies on kinetics of galaxolide (HHCB) degradation under influence of UV, simulated sunlight and some advanced oxidation processes (H2O2, UV/H2O2, and Vis/H2O2) were conducted. Galaxolide appeared to be a photolabile compound. The first-order kinetics model was assumed for all studied processes. It was observed that basic pH favored HHCB degradation. The influence of natural matrices (river water and artificial sweat) on direct photolysis of HHCB was examined. It was stated that the process of the photodegradation proceeded slower at the presence of each matrix. HHCB lactone was identified using the GC-MS technique. The recorded chromatograms showed that apart from the lactone, other degradation products were formed that we could not identify. In order to deeper understand the HHCB degradation process, DFT calculations were performed. The results pointed out that OH radicals play a key role in HHCB decomposition, which mainly proceeds via H abstractions as well as OH additions. It follows from the calculations that the visible light is sufficient to initiate the advanced oxidation processes (AOPs) under the oxidative conditions, whereas UV irradiation is needed to start decay with no oxidative agents.

scholarly journals Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2094
Author(s):  
Laura Antiñolo Bermúdez ◽  
Jaime Martín Pascual ◽  
María del Mar Muñio Martínez ◽  
Jose Manuel Poyatos Capilla
Keyword(s):  
Wastewater Treatment ◽  
Advanced Oxidation Processes ◽  
Wastewater Treatment Plants ◽  
State Of The Art ◽  
Advanced Oxidation ◽  
Natural Environments ◽  
Tertiary Treatment ◽  
Oxidation Processes ◽  
Different Types ◽  
Degradation Of Pollutants

In recent years, many scientific studies have focused their efforts on quantifying the different types of pollutants that are not removed in wastewater treatment plants. Compounds of emerging concern (CECs) have been detected in different natural environments. The presence of these compounds in wastewater is not new, but they may have consequences in the future. These compounds reach the natural environment through various routes, such as wastewater. This review focuses on the study of tertiary treatment with advanced oxidation processes (AOPs) for the degradation of CECs. The main objective of the different existing AOPs applied to the treatment of wastewater is the degradation of pollutants that are not eliminated by means of traditional wastewater treatment.

AOPs enhance the migration of polystyrene nanoparticles in saturated quartz sand

2021 ◽  
Author(s):  
Kai-Xin Zhang ◽  
Chao Song ◽  
Shan Zhao ◽  
Zhen Yan ◽  
Li-Juan Feng ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Quartz Sand ◽  
Advanced Oxidation Processes ◽  
Wastewater Treatment Plants ◽  
Advanced Oxidation ◽  
Point Sources ◽  
Polystyrene Nanoparticles ◽  
Oxidation Processes ◽  
Treatment Processes ◽  
Significant Point

Wastewater treatment plants are suspected to be significant point sources of microplastic and nanoplastic particles (NPs) into the environment. As one of the main wastewater treatment processes, advanced oxidation processes...

Textile Wastewater Treatment by Advanced Oxidation Processes

2018 ◽  
pp. 93-116 ◽  
Author(s):  
Gamallo Maria ◽  
Moldes-Diz Yolanda ◽  
Taboada-Puig Roberto ◽  
Lema Juan Manuel ◽  
Feijoo Gumersindo ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Textile Wastewater ◽  
Oxidation Processes ◽  
Textile Wastewater Treatment
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